51126995189 has 2 divisors, whose sum is σ = 51126995190. Its totient is φ = 51126995188.

The previous prime is 51126995081. The next prime is 51126995201. The reversal of 51126995189 is 98159962115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46418702500 + 4708292689 = 215450^2 + 68617^2 .

It is a cyclic number.

It is not a de Polignac number, because 51126995189 - 2²⁴ = 51110217973 is a prime.

It is a super-2 number, since 2×51126995189² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51126995989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25563497594 + 25563497595.

It is an arithmetic number, because the mean of its divisors is an integer number (25563497595).

Almost surely, 2^51126995189 is an apocalyptic number.

It is an amenable number.

51126995189 is a deficient number, since it is larger than the sum of its proper divisors (1).

51126995189 is an equidigital number, since it uses as much as digits as its factorization.

51126995189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 56.

The spelling of 51126995189 in words is "fifty-one billion, one hundred twenty-six million, nine hundred ninety-five thousand, one hundred eighty-nine".